<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<input  onclick="onclickItem()" onblur="onblurItem()" onfocus="onfocusItem()" type="text"/>

<script>
    function onclickItem() {
        alert("onclick");
    }
    function onblurItem() {
        alert("onblur");
    }
    function onfocusItem() {
        alert("onfocusItem");
    }
</script>
</body>
</html>